<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <div> 系统B主页 </div>
    <div>当前登录的用户为：[[${username}]]</div>
    <form action="./loginout" method="post">
        <button class="btn btn-lg btn-primary btn-block" type="submit">退出登录</button>
    </form>

</body>
</html>